This crossword No. 12951 clues and answers were published on Sat 12 Nov 2011 and the puzzle can be visited by following The Guardian Quick Crossword No. 12951 link.
All Across Clues and Answers:
1-across – Begin to make : BREAKTHEICE
9-across – Collection of 100 short stories by Boccaccio — rename cod : DECAMERON
10-across – Untruth : LIE
11-across – Happen : OCCUR
13-across – Grow less — waste away : DWINDLE
14-across – Summon to return : RECALL
15-across – Victor : WINNER
18-across – Seafarer : MARINER
20-across – Begin : START
21-across – Gist — kernel : NUB
22-across – Amusement — redirection : DIVERSION
24-across – Cool as a cucumber — rue pub trend : UNPERTURBED
All Down Clues and Answers:
2-down – Gigantic bird of Arabian legend : ROC
3-down – Naval officer : ADMIRAL
4-down – Harangue : TIRADE
5-down – Boredom : ENNUI
6-down – Roman name for Scotland : CALEDONIA
7-down – Recess : ADJOURNMENT
8-down – Incisive : PENETRATING
12-down – Nursery rhyme bird killed by an arrow : COCKROBIN
16-down – Is rerun : INSURER
17-down – Item of neckwear : CRAVAT
19-down – Gentle push : NUDGE
23-down – Decorate with frosting : ICE
This crossword has in total 24 where 12 are across and 12 are down.